{"product_id":"5770-4-1-32-over","title":"Robert Charles Plain Shank Counterbore M35-HSS-E 5% Cobalt - #4 Cap Screw Size - 0.143 Pilot Size","description":"\u003cdiv\u003e\n\u003cp\u003eThe Robert Charles Plain Shank Counterbore is a precision cutting tool built for machinists, engineers, and workshop professionals who demand clean, accurate counterbores with reliable, repeatable performance. Crafted from M35 HSS-E with 5% cobalt, it delivers strong heat resistance and wear life to tackle demanding metalworking tasks.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial\u003c\/b\u003e: M35-HSS-E with 5% cobalt for improved heat resistance and extended edge life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShank Type\u003c\/b\u003e: Plain shank designed for straightforward fitment in standard tool holders, enabling stable, efficient machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePilot Size\u003c\/b\u003e: 0.143 inch pilot ensures precise starting alignment and consistent counterbore concentricity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCap Screw Compatibility\u003c\/b\u003e: Sized for #4 cap screw applications, making it suitable for common assembly hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eApplications\u003c\/b\u003e: Ideal for precision engineering, automotive work, and general workshop counterboring tasks where durability and consistency matter.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis counterbore delivers dependable, repeatable results by maintaining alignment and reducing setup time, thanks to its plain shank and robust cobalt-infused steel. It’s a practical choice for professionals who routinely perform high-precision counterboring across a range of materials, ensuring clean finishes and reliable performance batch after batch.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Robert Charles","offers":[{"title":"Default Title","offer_id":43411726860366,"sku":"5770-4-1\/32 OVER","price":33.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/Robert_Charles_Counterbores_7b3f3891-0caa-4038-9d68-f50bcdbaa42e.png?v=1769685242","url":"https:\/\/www.protool-ltd.co.uk\/products\/5770-4-1-32-over","provider":"Protool Precision Tools","version":"1.0","type":"link"}